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Theoretical study on the photodoping effects in La 1– x Sr x MnO 3 /SrNb y Ti 1– y O 3 p–n heterojunction
Author(s) -
Liao Leng,
Jin Kuijuan,
Lu Huibin,
Qiu Jie,
Han Peng,
Zhang Lili
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200824406
Subject(s) - heterojunction , oxide , poisson's equation , charge carrier , space charge , charge (physics) , space (punctuation) , condensed matter physics , materials science , physics , analytical chemistry (journal) , chemistry , electron , quantum mechanics , computer science , metallurgy , chromatography , operating system
The dynamic process of photodoping effect in the heterojunction of La 0.9 Sr 0.1 MnO 3 /SrNb 0.01 Ti 0.99 O 3 is revealed theoretically. By solving Poisson Equation and time‐dependent carrier continuity equations, the evolutions of the carrier concentrations and the electrical potential are obtained self‐consistently. The calculated photovoltage evolution agrees well with the experimental data. The present results demonstrate that the large variation of carrier concentration mainly locates in the space‐charge region of the oxide heterojunction. It means that the photodoping effect mainly occurs in the space‐charge region of heterojunction. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)